SECTIONS IN MISSOURI AND ILLINOIS. 287 



Ste. <u nevieve to Ste. Mary* 



Feet. 



S. Soil 3 



7. Soft, yellow ferruginous sandstone, exposed 15 



li. Clay-shales and heavily bedded blue limestone 125 



5. Yellowish sandstone (Aux Vases river) 70 



4. Bluish thinly bedded limestone (Ste. Genevieve) 45 



:!. Rather heavily bedded blue and ash-colored limestone with marly part- 

 ings, showing cross-bedding in places ; oolitic and cherty locally 135 



2. White oolite, fossiliferous 15 



1. Massive, compact limestone, white in color and highly fossiliferous; ex- 



posed 50 



Number 1 is probably upper Keokuk. Numbers 2 to 4 belong to the 

 St. Louis group; while number G is the Kaskaskia. Number 7 is the 

 basal sandstone of the Coal Measures. 



Chester Section. 



Feet. 



8. Furruginous sandstone with plant remains ; exposed 25 



7. Green and blue clayey shales with occasional limestone bands 10 



6. Gray limestone, more or less nodular and impure 45 



5. Green and blue clayey shales with thin limestone layers, highly fossil- 



ifer< »us in places 45 



4. Heavily bedded, compact encrinital limestone with clay partings 3 



3. Drab fossiliferous shales with thin calcareous seams 4 



2. Dark drab compact limestone 4 



1. Heavily bedded blue and gray limestone ; above water level 75 



The Kinderiiook Beds. 



Definition. — There seems to be a general unanimity of opinion as 

 to the propriety of regarding as a distinct subdivision the lower Carbon- 

 iferous rocks of the Mississippi basin below the Burlington limestone. 

 The upper line of demarkation is easily recognizable throughout its geo- 

 graphic extent. Its lower limit, however, has not been made out satis- 

 factorily over the entire area of its occurrence ; but in many places the 

 group of strata is known to rest on the "black shale" so well developed 

 in Tennessee and generally regarded as Devonian in age. Forthegroup 

 of beds in question, or parts of the group, various names have been given. 

 Bui their historical consideration need not be dwelt upon at Length here. 

 Whatever may be eventually the most, appropriate term to apply to this 

 section, it seems advisable for the present to retain Meek and Wbrthen's 

 name for these rocks as exposed along the line of the Mississippi river. 



*The sections of Ste. Gene\ ieve, Chester and Louisiana are from personal notes made in connec- 

 tion with the i loi ii al survey of Mis i and arc incorporated in this placi bj the kind perm is 



h i of thi tute gcologi i Mi Arthur Winslow 



